Repeater apparatus



(I. S. DEMAREST AND O. H. LOYNES.

REPEATER APPARATUS. APPLICATION FILED OCT. 2, 19'I9.

mum Mm. 21, 1922.

2 SHkhlS-SHEET 7' INVENTORI dflb ylze; I

c. s. DEM/WEST AND 0. H. LOYNES.

REPEATER APPARATUS,

APPYLICATION FILED OCT. 2| 1919.

2 SHEETS SHEET 2.

a fi

ATTORNEY Patented Mar. 21,1922

. ARES'I' and. OWEN H. LoYNEs,. residing at- UNITED CHARLES s. DEMAREST, or nnooxmm,

woon RIDGE, NEW

emu COMPANY, A oonroRArIon on NEW Yong.

JERSEY, ASSIGNQBS T .AMERICAN NEW YORK, AND OWEN n. LOYNES, or

TELErHoNE AND TELE REPEATER- APPARATUS.

To all whom it may concern! Be it known that we, CHARLEs S; DEM- Brooklyn and Wood Ridge, in the counties of Kings and Bergen and States of New York and New Jersey,-respectively,"have invented certain Improvements in Repeater Apparatus, of which the following is a specification.

This invention relates to telephone systems and more particularly'to repeater apparatus and circuits included in such systems.

It has heretoforebeen thepractice in de- "signing and manufacturing repeater sets for use; in telephone systems to provide dlfierent types ofrepeater sets for different types of installations. Accordingly, special features would be'taken intoconsideration when a repeater set was to be used with cord cirg cuit apparatus, which might'render such a repeater set unsuitable for use in through line operation and vice versa. In view of the above, it is one of thecardinal features of this invention to provide a repeater set which will be of simple design and capable" of use with different types of installations.

Other and further. features ofthe invention will be clear from the detailed description,

hereinafter given.

In. providing the repeater set of this in vention, it has been the general plan to dissociate from the repeater set all apparatus not essentially a part of the basic repeater unit; that is, all associated apparatus such as that used for signaling, testing, switch ing, supervision, and other purposes which might be required to have special features adapted to diiierent types of installations and suited only for specific uses of the repeater. All such associated and non-essential apparatus would be included as a part of the circuit connected with the repeater set, such as a cord circuit, or through line apparatus.

The inventon may be inore fullyunderstood from the following description taken in connection with the acompanying drawing in the Figures 1 and 2 of which, when taken together, is illustrated a circuit diagram of a referecl form of the invention.

in the -ig. 2 is illustrated the repeater set of this invention associated with'the cord circuit illustrated in Fig. 11 The repeater Y set includes the vacuum-bulb amplifiers A and A the Potentiometers 1 and 2, the usual threewinding transformers 3 and l, and the which connections'are made with the plu Specification of Letters Patent. Patented Mar, 21, 1922 Applicatlohfiled were, 1919. Serial No. 327,973.

P and P Associated 'with the line and network conductors of the cord circuit are the supervisory ormonitory windings 5 and 6,'which are associated with the contacts of key K which in turn is associated with an .operators supervisory apparatus. The cord circuit also includes the splitting key K which permits the operator to talk in either direction. Bridged across the line conductors of the cord circuit are the ringing resp'onsive relays 7 and 8, which are actuated by ringing current transmitted over lines with which connections are established by the plugs P and P The relays 7 and 8 control the relay 9 and the supervisory signaling lamp 10. Associated with the cord circuit are the keys K5 K and K and the relays 11, 12 and 13, which serve to control potentiometers l and 2, and thus regulate and set the gain of the repeater at a desired value. The operation of the invention is as follows: If aconnection is established with the cord circuit betweentwo long'distance lines by inserting the plugs P, and P in the jacks of such lines and the key K is not operated, a talking circuit will be completed through the cord circuit and the repeater set over the following circuit: from u llllle contacts of plu P over conductors 1-, normal contacts 0 key K over conductors i5, armatures and normal contacts ofrelay 1 conductors 16, contacts of ack 3,, and

through the repeater set in the usual. manner, over the contacts of jack J over conductors 18, normal contacts and armatures of relay 19, conductors .20, normal contacts of key K conductors 21, line contacts of plug P (in the above traced connections it will be possible to obtain supervision hy operating the key ii, and connecting the. conductors 39 leading to the operato' the condu are connected pervisory apparatu" a": a n, which in a monitoring coils 5 and 6, respectively. If, when the above traced connection is established, ringing current should be transmitted back over one of the connected lines, either of the relays 7 or 8 will be operated and operate the supervisory signal lamp 10 in the following manner. Ringing current transmitted back over the line connected-with plug P, will-be transmitted over the line contacts of plug P over conductors 1 1, normal contacts of key K conductors 15, and through the winding of relay 7. As the relay 7 is responsive to ringing currents, it will pull up its armature and close the following circuit: from ground, armature and contact of relay 7, conductor 42, conductor 43, winding of relay 9, to battery and ground;

This will operate the relay 9 and close a circuit through the filament of supervisory signal lamp 10. At the same time the following locking circuit will be closed for relay 9: from ground and battery, winding of A relay 9, right hand contact and armature of relay 9, conductor 44, conductor 45, conductor 46, normal contact of key K,, to ground.

If the rin ing current were transmitted back over t e line connected with the plug P the ringing current would be transmitted over conductors 21, normal contacts of key K conductors 20, and through the winding of relay 8. Asthe relay 8 is responsive to ringing current, it would pull up its arma ture andclose the following circuit: from ground, armature andcOntact. of relay 8, over conductors 47 and 43, winding of relay 9, to battery and ground. In the same manner as formerly pointed out, the closing of this circuit will operate relay 9 and the su ervisory signal lamp 10.

y operating ,the splitting key K, and the key K the operator may connect her telephone set with the cord circuit for transmis sion in either direction in the following manner. If the operator desires to talk over theline with which a connection is made with plu P,, the splitting key K will be thrown to the left and the key K will be thrown to the right. This will close the following circuit: from ground, upper left hand make contact of key K conductors 22 and 23, and thence over conductors 24 and 25, about the windings of relays 17 .and 26, to battery and round and also about the windings of refiiys 19 and 30 to battery and ground, This W111 operate relays 17 and 26 and disconnect the repeater set from the cord circuit and connect the operators telephone set with the line associated with plug P in the following manner: from conductors associated with the operators telephone set. right hand make contacts of key K conductors 81, conductors 36 and 37, right hand normal contacts of key K conductors 35, make contacts and arma tures of relay 17, conductors 15, contactsof key K conductors 14, contacts of plug P and. thence to the line connected to plug P If the operator desires to talk over the line connected to plug P, the splitting key K is.

thrown to the right and key'K is thrown to contact of key K conductor 82, 83, 22, 27,

and thence over conductors 28 and 29, about the windings oi relays 19 and 30, to battery and ground. and also about the windings of relays 17 and 26 to battery and ground. The operation of relays l9 and 30 will disconnect the repeater-set from the cord circuit and will connect the operator's telephone set with the line connected to plug P, in the following manner: from conductors 80 associated with the operators telephone set, make contacts of key K conductors 81, left hand nor; mal contacts of key K conductors 38, make contacts and armatures of relay 19, conductors 20, contacts of key K conductors 21,.

contacts of plug P and thence to the line connected with plug P The gain of the amplifiers A, and A, ofthe repeater set is effected by adjustments of the potentiometers 1 and 2, which adjustment is in turn regulated by the keys K K and K in the following manner: When the plug P is connected with the jack of a line ground will be applied from the sleeve contacts of the jack of said line to the sleeve contacts of plug P and a circuit will be completed from the sleeve contacts of plug P over conductor 48, winding of relay 4:9, to battery and ground. The closing of this circuit will operate relay 19, which will apply round over its armature and contact to cond uctor 50, and thence to the contacts of the keys K K and K,. The operation of key K will operate relayll by closing the following circuit: from ground applied to contacts of key K over conductor 51, winding of relay 11, conductor 52, to battery and ground. The operation of key K will oper-.

and over conductors 62, 63, 64;, 65 and 66',-

thereby regulating the gain of the repeaters associated therewith.

By means of the jacks J J J and J and patching cords (not shown) the repeater set may be connected for through line opera tion-in. a long distance line without any further change in equipment other than to disconnect the potentiometer leads at terminals 70 and 71 from their controlling apparatus ,iiuohof the leads as desired.

While the invention has been illustrated witha specific cord circuit arrangement, it is pointed out that it is capable of use With other types 'of cord circuits and long dist'a n ,ce lines. Accordingly, while the inven- 'ti'oh has been disclosed in certain specific arrangements which have been deemed desirable, it is understood that itis capable of em -bodiment in many and widely varied forms without departin from the spirit of the invention as define in the appended claims.

WVhat is claimed is:

1. A two-way two-element repeater having line conductors and network conductors, said conductors terminating in the line and network plugs respectively of a link circuit, supervisory windings in all of said conductors, a supervisory circuit inductively related to said windings, switching means, and

relay means controlled by said switching means whereby said repeater may be disconnected from said line and network conductors, said supervisory arrangements being operative. when said switching means are operated.

2. A two-way two-element repeater having line conductors and network, conductors, said conductors terminating in the line and network plugs respectively of a link circuit,

supervisory windings in all of said conductors, a supervisory circuit inductively related to said windings, an operators telephone set, a splittin key, and relay means controlled by said splitting key whereby said repeater may be disconnected from said line and network conductors and said operators telephone set may be connected to a pair of said line conductors, said supervisory arrangements being operative when said splitkey is operated.

tin v I n testimony whereof, We have signed our names to this specification this 30th day of September, 1919.

CHARLES S. DEMAREST. OWEN H. LOYNES. 

